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A dual power supply circuit for usb storage system

A dual power supply and storage system technology, applied in static memory, data processing power supply, electrical digital data processing, etc., can solve problems such as USB storage system not working normally, reading failure, USB storage system removal, etc., to overcome the inability to Effects of adaptability, reliable operation and strong applicability

Active Publication Date: 2020-03-17
TIANJIN EMBEDTEC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sometimes the USB storage system cannot be taken out of the large system alone. If it is directly connected to the USB port of a device such as a PC or cannot meet the power supply requirements of the entire large system, the USB storage system cannot work normally, resulting in failure to read

Method used

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  • A dual power supply circuit for usb storage system

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Embodiment Construction

[0008] Below, the substantive features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed examples.

[0009] see figure 1 As shown, a USB storage system dual power supply circuit, which is an interlocking power management circuit, including:

[0010] System power supply 5V power supply 1, USB power supply 5V power supply 2, first NMOS transistor 4, second NMOS transistor 5, first PMOS transistor 6, second PMOS transistor 7, first resistor 8, second resistor 9;

[0011] Wherein, the system power supply 5V power supply 1 is connected to the S pole of the first NMOS transistor 4, the USB power supply 5V power supply 2 is connected to the S pole of the second NMOS transistor 5, one end of the first resistor 8 is connected to the S pole of the first NMOS transistor 4, and the first The other end of the resistor 8 is connected to the G pole of the first PMOS transistor 6, one end of ...

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Abstract

The invention relates to a double-power supply circuit for a USB storage system, and the circuit comprises a system power supply 5V power supply, a USB power supply 5V power supply, a first NPN type MOS tube, a second NPN type MOS tube, a first PNP type MOS tube, a second PNP type MOS tube, a first resistor and a second resistor. According to the double-power supply circuit disclosed by the invention, the two NPN type MOS tubes are adopted to form an interlocking circuit, and thus, output modes can be controlled and selected according to different power supply modes so as to achieve an effect that the USB storage system not only can work by using an external power supply, but also can be supplied with power to work in an offline mode by using equipment with a USB port reading function; the defect of incapability of adaptation to the system in the prior art is overcome; and the double-power supply circuit has the characteristics of simple structure, working reliability, high applicability and the like.

Description

technical field [0001] The invention belongs to the technical field of USB storage system power supply, and in particular relates to a dual power supply circuit of a USB storage system. Background technique [0002] At present, in the application of some USB storage systems, the USB storage system exists in a large system with multiple peripherals, and the large system supplies power for all boards, while the USB storage system often needs to work in a separate USB power supply state for offline reading. Get the data in the USB storage system. However, sometimes the USB storage system cannot be taken out of the large system alone. If it is directly connected to the USB port of a device such as a PC or cannot meet the power supply requirements of the entire large system, the USB storage system cannot work normally, resulting in failure to read. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned technical problems and pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/26G11C5/14
CPCG06F1/263G11C5/141
Inventor 高臣郑雍
Owner TIANJIN EMBEDTEC